Let's you control the console via phone or tablet, also for some content and games it provides a second screen. So you would be able to see the map for the game you are playing on the tablet and keep playing on the TV. You can also use the keyboard on the phone or tablet to input on the console, like when browsing web sites.

Down the road more and more games and movies will use this and give you more interaction. I'm waiting for the iOS version to come out so my wife can use her iPad to control the 360. Right now I have been using it via my Windows Phone,. The app is out for Android but needs Jellybean to work, I don't have any of my 'Droid devices on Jellybean yet.